360 BOTANY. Ceecocaepus LEDIFOLIUS, Nutt—Southern Sierras (330), I. c. p. 174. " Mountain Mahogany." Potentilla glandulosa, Lindl., var. Nevadensis, Watson.—Kern River, at 9,850 feet altitude (376), I. c. p. 178. Potentilla geacilis, Dougl., var. eigida, Watson.—In my specimens, from head of Peru Creek, the leaflets are from 1^-2 J' long (243); I. c. p. 179. Potentilla Wheeleei, Watson (Proc. Am. Acad, xi, p. 148).—South¬ ern Sierra Nevada, on Mount Olanche, at 8,200 feet altitude; I. c. p. 179.— Plate III, B. Plant about natural size. Fig 4. Flower, seen from above; 5, seen from beneath; 6, vertical section of flower; all enlarged about 8 diameters. Fig. 7. A single pistil. HoEKELiA Califoenica, Ch. & Sch.—Santa Barbara (21,19), I. c. p. 181. HoEKELiA PUEPUEASCENS, Watsou (Proc. Am. Acad. xi, p. 148).—"Col¬ lected by Dr. J. T. Rothrock on the headwaters of Kern River, at 9,000 feet altitude. An unmistakable Horkelia, but like H. tridentata, inter¬ mediate between the typical species and those of Ivesia, leaving it almost impossible to preserve the latter genus distinct. Specimens of U. tridentata have recently been found with decidedly deltoid filaments, showing that this character may fail even to be specific." To the above remarks I can only add that in a flower of H. purpurascens I have found the distinction between the subulate and fihform filaments to fail, as all were between subu¬ late and deltoid, except two, which were rather deltoid, thus destroying the shape of the filaments entirely as a specific character. The varying num¬ ber of carpels in both genera is another fact indicating still further the necessity of uniting Ivesia to this genus. I imagine that most American botanists will continue to keep up the distinction between this genus and Potentilla, whatever may become of Ivesia. I. c. p. 182.—Plate III, A. Plant natural size. Fig. 1. Unopened flower-bud; 2, expanded flower; 3, petals of flower removed and calyx laid open to show the character and insertion of the stamens; all enlarged about 6 diameters. Ivesia santalinoides. Gray (Proc. Am. Acad, vi, 531, and vh, 339).— Mount Pinos, at 8,500 feet altitude, I. c. p. 183. Rosa Califoenica, Ch. & Schl.—Santa Barbara, and to an elevation of 5,100 feet in the Coast Range (22, 228, 23), I. c. p. 187.